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AMD's new Ryzen 3 3100 is the new budget king. At just $99, it offers four cores and eight threads, obsoleting most of Intel's lineup. Results in our Ryzen 3 3100 review show that it punches well above its weight, competing even with Core i5 and Ryzen 5. Overclocking worked great, too; we...

www.techpowerup.com

One thing that stood out to me

Ryzen 3000 series really runs hot. And this chart is on a Noctua NH-U12.
Add 10°C for the stock cooler. And another 10°C since the reviewer is from Germany.
Then Ryzen 5 3600 is basically at 85°C.
Core i5 8400 runs cool in comparison.

Super Moderator

Ryzen 3000 series really runs hot. And this chart is on a Noctua NH-U12.
Add 10°C for the stock cooler. And another 10°C since the reviewer is from Germany.
Then Ryzen 5 3600 is basically at 85°C.
Core i5 8400 runs cool in comparison.

I am planning on getting a good thermal paste or may be I will sell it on olx/exchange in amazon oct sale. Try OLX or quikr or maybe ask mdcomputers to replace sealed ones with better option by paying the difference. AFAIK, there are no exchange offers for Thermal Pastes :rofl:

Well-Known Member

I just tested last night and find it very strange that the i3 8100 give me 63*c prime95 while the i5 8400 only 58*c ,theoretically the the i5 have higher clock plus 2 more cores mean it will generate more heat ......

Gear up ...

I just tested last night and find it very strange that the i3 8100 give me 63*c prime95 while the i5 8400 only 58*c ,theoretically the the i5 have higher clock plus 2 more cores mean it will generate more heat ......

This seems like a good reason " i5 has a better mount than the i3 in terms of the IHS to die mating ", mentioned in that thread.

Another reason can be that the i3 needs more voltage than i5. An i3 is just a defective chip of sorts. Back in initial Ryzen 1st gen days, some lucky R5 1600 users got an 8 core CPU, surely was running a bit slower than R7 but still it was 8 legit cores, 2 of them AMD forgot to disable properly.

Only recently - due to intel's cpu shortages - we can find on MB support pages that some specific i3/pentium models might come in U0 flavor.
But, since OP's i3 cpuid is 906EB, it is B0 die - the full, non-defective 4 core.

Super Moderator

AMD's new Ryzen 3 3100 is the new budget king. At just $99, it offers four cores and eight threads, obsoleting most of Intel's lineup. Results in our Ryzen 3 3100 review show that it punches well above its weight, competing even with Core i5 and Ryzen 5. Overclocking worked great, too; we...

www.techpowerup.com

One thing that stood out to me

Ryzen 3000 series really runs hot. And this chart is on a Noctua NH-U12.
Add 10°C for the stock cooler. And another 10°C since the reviewer is from Germany.
Then Ryzen 5 3600 is basically at 85°C.
Core i5 8400 runs cool in comparison.

Well-Known Member

The NH-U14S is the 14cm top model of Noctua’s classic U-series single tower CPU coolers, which have received more than 400 awards and recommendations from the international press. While the large, six heatpipe design and the NF-A15 140mm fan with PWM support for fully automatic speed control...

noctua.at

"The latest Ryzen 3000 processors (except APU models) differ from previous Ryzen generations in that they are no longer based on a single, large chip but use a multi-chip approach with smaller chips instead. Depending on the exact model there can be one (6 and 8-core models) or two (12 and 16-core models) actual CPU-Dies (CCD) on the package. Each processor also uses an I/O-Die (IOD), which contains things like the memory controller, PCIe controller, connections to the motherboard chipset and other functions.

Because of this design change and the switch to a smaller 7nm manufacturing process, the heat distribution of the overall processor is much different from older 14nm and 12nm based single-chip Ryzen processors with a similar power draw.

Depending on the exact CPU model, its specified TDP value and possibly extended power limits (precision boost overdrive), a single CPU-die can create a heatload of up to 130W easily, whereas the I/O-die usually creates a heatload of about 10W. Due to the small size of the CPU-die, the heat density (W/mm²) of this chip is very high. For example, a 120W heatload at a chip-size of 74mm² results in a heat-density of 1.62W/mm², whereas the same heatload on an older Ryzen processor with a chip-size of 212mm² gives a heat-density of just 0.57W/mm².

This large difference in heat-density is the reason why newer Ryzen 3000 processors become much warmer at similar heatloads than their predecessors.

Furthermore, Ryzen 3000 CPUs are using the rated temperature headroom (up to 95°C) quite aggressively in order to reach higher boost clocks. As a result, it is absolutely no problem and not alarming if the processor runs into this temperature limit. The clock speed and supply voltage will be adjusted automatically by the processor itself in order to remain within AMD’s specifications and to prevent overheating.

Due to the higher heat density, higher thermal limits and more aggressive boost clock usage, it is perfectly normal that Ryzen 3000 CPUs are reaching higher temperatures than previous generation Ryzen CPUs with the same TDP rating. Higher CPU temperatures are normal for Ryzen 3000 processors and not a sign of that there is anything wrong with the CPU cooler."

I am not sure using 95°C as the throttle limit is good for the life of the CPU and mobo.
I wish reviewers tested CPUs as they do PSUs - in a 50°C hotbox and with the stock cooler. Surely there will be some performance penalty due to throttling.

Super Moderator

I am not sure using 95°C as the throttle limit is good for the life of the CPU and mobo.
I wish reviewers tested CPUs as they do PSUs - in a 50°C hotbox and with the stock cooler. Surely there will be some performance penalty due to throttling.

Exactly & this is especially important for a country like India where majority of the region experience 40C+ temp for months. I think it is better to get a good aftermarket cooler for those doing some serious gaming/workstation stuff on ryzen 3rd gen processors unless some review can prove that stock coolers are good enough.